<template>
  <a-breadcrumb>
    <a-breadcrumb-item
      v-for="(item,index) in levelList"
      :key="item.path"
    >
      <span
        v-if="index==levelList.length-1"
        class="no-redirect"
      >{{ item.meta.title }}</span>
      <a
        v-else
        @click.prevent="handleLink(item)"
      >{{ item.meta.title }}</a>
    </a-breadcrumb-item>
  </a-breadcrumb>
</template>

<script>
  import pathToRegexp from 'path-to-regexp'
  export default {
    data() {
      return {
        levelList: null
      }
    },
    watch: {
      '$route'() {
        this.getBreadcrumb()
      }
    },
    created() {
      this.getBreadcrumb()
    },
    methods: {
      getBreadcrumb() {
        let matched = this.$route.matched.filter(item => item.name)
        const first = matched[0]
        if (first && first.name !== 'dashBoard') {
          matched = [{ path: '/dashboard', meta: { title: 'Dashboard' }}].concat(matched)
        }
        this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
      },
      pathCompile(path) {
        // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
        const { params } = this.$route
        var toPath = pathToRegexp.compile(path)
        return toPath(params)
      },
      handleLink(item) {
        const { redirect, path } = item
        if (redirect) {
          this.$router.push(redirect)
          return
        }
        this.$router.push(this.pathCompile(path))
      }
    }
  }
</script>

<style>
.no-redirect {
      color: #97a8be;
      cursor: text;
    }
</style>
